2022-01-27: TR-181 Issue 2 Amendment 15

• Converted the document to markdown and extended the Wi-Fi Theory of Operation
• Split the XML into multiple smaller files (this is just housekeeping; it
  doesn't affect how the model is used)
• Added Device.USPAgent to the CWMP model to allow a CWMP ACS to configure a
  device for USP communications
• Allowed USP to access the EnableCWMP parameter (so a USP Controller can
  enable/disable CWMP access)
• Added Device.Routing.Babel for the RFC 8966 Babel routing protocol
• Added Device.DOCSIS for modeling DOCSIS 3.0 and 3.1 interfaces
• Added Device.Users.Group, Device.Users.Role and Device.Users.SupportedShell
  tables for modeling system users
• Improved the Wi-Fi data model by adding Data Elements R2 parameters,
  commands and events, moving MultiAP parameters and commands into the Data
  Elements structure, and by deprecating AIFSN, ECWMin, ECWMax and TxOpMax
• Clarified the LockoutPeriod and Retries ControllerTrust parameters that
  impact how the RequestChallenge() and ChallengeResponse() data model
  commands handle failed attempts
• Clarified bulk data profile, threshold and periodic statistics USP
  Controller permissions: only the USP Controller that created the profile
  will receive the corresponding events
• Added a bulk data profile ForceCollection() command
• Added support for a new bulk data collection mechanism that utilizes MQTT
  as the transport protocol
• Removed old bulk data collection protocols (Streaming and File) from the USP
  data model (they don't apply to USP)
• Updated the IPLayerCapacity() test to support TR-472 Issue 2
• Added an enumeration to indicate when a Boot! event was due to a factory
  reset
• Added an enumeration to distinguish encrypted and unencrypted USP MQTT
  WebSocket connections
• Added an Order parameter to provide guidance to USP Agents on which MTP to
  use when communicating with a Controller
• Clarified that Device.Optical is intended for generic optical interfaces
  and is not intended to model anything specific to IEEE or ITU-T PON
  technologies (objects specific to such technologies may be added in future
  versions of the data model)
• Clarified the meaning and usage of the Device.Ethernet.Interface and
  Device.Ethernet.Link objects (also allowed the Ethernet Link MACAddress
  parameter to be written)
• Improved (and made more consistent) the marking of (and explanation of)
  deprecated items, and how such items should progress from being deprecated
  to obsoleted to deleted
• Added a Baseline:4 profile that doesn't include Device.LANConfigSecurity
  (it relates to the now-deprecated TR-064 LAN management protocol)
• Many minor improvements to object, parameter, command and event descriptions
• Replaced the non-standard dmr:version attribute with the version attribute
  (which supports three levels of version)
• Switched to DMR (data model report) schema v1.0, which supports multi-line
  paragraphs, and wrapped all lines to 80 characters maximum